The best free LinkedIn comment generator depends on where you want the draft to show up. For a quick draft with no signup, Planable and Nuelink run web generators where you paste the post and pick a tone, and Commentify's takes a post URL and returns six different angles. If you would rather not leave LinkedIn, Engage AI and AIReplyBee offer free tiers of Chrome extensions that draft inside the comment box. A general chat assistant with a saved instruction is one more option, and often the strongest, because it can be told how you write.
All of these write. None of them finds the post for you or remembers who you commented on last week. That is a different kind of tool, and the difference is covered near the end.
Disclosure: this post is published by Icebreakly. We have a free LinkedIn comment generator of our own, which is left out of the comparison below. We also sell a paid tool in the neighboring category, which is described in one short section below.
How these were reviewed
We read each vendor's own tool page, pricing page and, for extensions, the Chrome Web Store listing on October 2, 2026. This is a review of what those pages say, not a hands-on test of output quality, so we make no claim about which one writes best. Free limits are the ones each vendor published that day and they tend to move.
Web generators: paste, pick a tone, copy
These run on the vendor's website. They never touch your LinkedIn account. You bring the post to them and carry the comment back.
| Generator | You give it | Options | Signup |
|---|---|---|---|
| Planable | Details or context about the post | 10 tones, short or long, 1, 3 or 5 variations, emoji on or off | None, per its page |
| Nuelink | The post or comment text, optional instructions | 10 writing styles, short or long, emoji on or off | None; stated as unlimited |
| Commentify | A LinkedIn post URL | Six fixed styles returned at once | None, per its page |
| OutX | The post you want to comment on | Several suggestions per post | Described as free to try |
Planable
Planable's generator is the most configurable of the four. You choose from tones such as informative, casual, formal, witty and empathetic, add details to steer the comment, set the length and ask for up to five variations. Planable itself is a content planning and approval platform, so the generator is a side tool. It suits someone who wants several options to choose between.
Nuelink
Nuelink's tool is framed as a comment reply generator. It is aimed first at answering comments people leave on your own posts, though the form accepts a post caption as well. The page states it is free, unlimited and needs no login. It suits people who mainly want help keeping up with replies.
Commentify
Commentify's generator works from a URL, so there is no copying of post text. It returns six drafts in fixed styles: an insightful add-on, a personal story, a contrarian take, a data-backed comment, a curious question and a witty one-liner. Seeing six angles side by side is useful when you cannot think of a way in. Two of the styles need care, which is covered in the editing section below.
OutX
OutX's generator is the simplest: paste the post, get suggestions. OutX is a social listening product and the page's own advice is sound. It tells you to personalize every suggestion before posting.
Free tiers that draft inside LinkedIn
A Chrome extension puts a button in or near LinkedIn's comment box, so the draft appears where you will post it. That removes the tab switching, which is what makes paste-in generators tiring after a couple of weeks.
Engage AI. Its Chrome Web Store listing describes an assistant that works directly in the comment field, with selectable tones, custom prompts, and settings for length, emojis and words to avoid. The listing says a free option covers the core features, with paid plans above it. It suits people who already scroll LinkedIn daily. How it compares with Icebreakly is set out on the Engage AI comparison page.
AIReplyBee. AIReplyBee also adds a button inside the reply box. Its free plan is small and clearly stated: 10 replies a month with three tones. Paid plans start under $10 a month. It suits an occasional commenter who wants a nudge a few times a month.
Two near misses. Comment Rocket's free allowance is a one-day trial with 20 comments, so it is a paid tool with a test drive. LinkMate has a free plan with 100 AI comments a month, but it is an automation tool that engages on your behalf and does not work as a generator.
One caution for this group. LinkedIn's help pages say it does not permit browser extensions that modify the appearance of its website or automate activity on it, and its User Agreement restricts automated commenting in general. A drafting extension where you click Post yourself is a lighter touch than a tool that posts for you, but it is not the same as a web page that never touches LinkedIn.
The free option you may already have
ChatGPT and Claude both have free tiers at the time of writing, and either will draft a comment if you paste the post. Their advantage is that you can tell them who you are. A dedicated generator writes for an average professional. A chat assistant with this saved at the top of the conversation writes for you:
I work in [role] and sell to [who]. When I paste a LinkedIn post, draft one comment of at most 45 words. Refer to one specific detail from the post. Add one observation from my side of the table or ask one question the author could answer in a sentence. No praise words, no exclamation marks, no hashtags. Here are three comments I have written before: [paste them].
The three samples do most of the work. More structures like this are in ChatGPT prompts for LinkedIn comments.
Getting a comment worth posting out of any generator
Suppose an operations director writes that she cut her weekly leadership meeting from 90 minutes to 45 by requiring a one-page pre-read. A tone-only generator will tend to give you something like this illustration:
Great insights! Shorter, more focused meetings really do drive productivity. Thanks for sharing this approach!
Nothing in it is wrong and nothing in it shows you read the post. Four edits fix that.
- Name the detail. The pre-read is the specific thing in this post. Mention it.
- Delete the praise. "Great insights" is the phrase readers skip.
- Add something only you would say. A result, a failure, a constraint from your own work.
- End on a real question, or stop.
The pre-read is the part I'd underline. We cut our ops review to 45 minutes without one and simply ran out of time faster. What do you do when someone turns up without having read it?
That version works because it could not sit under any other post. If a generator hands you a statistic or a personal anecdote, as data-backed and story styles can, check the number and never post a story that did not happen to you. More worked examples are in AI LinkedIn comments that don't sound like AI.
What a generator will not do
A generator and a monitoring-and-posting tool are different things, even though both get called AI comment tools. A generator answers the question "what do I write?" at the moment you are looking at a post. It has no idea who your prospects are, cannot tell you one of them posted an hour ago and keeps no record of who has heard from you.
Monitoring tools watch a set of people or keywords, bring the posts to you and often publish the comment. They cost money and they act on your LinkedIn account, which carries the risk LinkedIn's terms describe. The fuller comparison is in AI comment generator vs comment automation.
Icebreakly is one of those tools. It monitors leads you add by profile URL, drafts a comment on each new post in a Voice trained on your samples, holds it for approval or posts on autopilot, and counts touches per lead. It is not free: there is a 7-day trial, then plans at $49 and $99 a month on the pricing page. It only works on leads you add yourself and only when they post, it does not target keywords or your feed, and it sends no messages or connection requests. If writing is your only problem, you do not need it.
What to do next
Pick one web generator and one chat assistant and use them on the same five posts this week. Keep every comment you were happy to publish in a note. After a fortnight you will know whether the wording was ever the bottleneck. If you kept forgetting to open LinkedIn, or kept finding your prospects' posts a day late, the problem is attendance, and how to get notified when someone posts on LinkedIn is the next thing to read.
Frequently asked questions
Is there a completely free LinkedIn comment generator with no signup?
Yes. At the time of writing in October 2026, Planable and Nuelink both state that their web-based LinkedIn comment generators are free and need no registration, and Commentify’s generator says it is free with no signup. You paste the post text or URL, choose a tone or style, and copy the result into LinkedIn yourself.
Will LinkedIn know I used a comment generator?
A web generator never connects to your LinkedIn account, so there is no technical link between the tool and the comment you paste. What readers and LinkedIn can notice is the writing itself: generic praise, the same structure every time, or a high volume of similar comments. Editing each draft so it refers to something specific in the post matters more than which generator produced it.
Are free comment generators good enough for prospecting?
They are good enough for the writing step. Prospecting also needs you to notice when a particular person posts and to keep track of how often you have engaged with them, and a generator does neither. For a short list of ten or fifteen people you can cover that with LinkedIn’s bell notifications and a spreadsheet. Beyond that, most people either accept patchy coverage or pay for a tool that monitors a list.
Should I post a generated comment without editing it?
No. Treat the output as a first draft. Check that it mentions a detail only this post contains, remove any statistic or personal anecdote the tool invented, cut it to the length you would naturally write, and add one sentence of your own experience or a real question. That usually takes under a minute and is the difference between a comment that starts a conversation and one that gets skipped.